Once you're in the spy game, you never leave, and though ex-army intelligence man Kirby (John Gregson) is now employed as an insurance salesman, he finds himself being shadowed by unknown agents. When they make their move, a bystander named Laura (Prunella Ransome) helps him to escape. But how innocent is she? Her stepfather is high-ranking civil servant Roger Thane (Patrick Allen), and it's his operatives who are following Kirby. Who can he trust? And why have the KGB and the CIA become involved? Produced as a miniseries in 1976 for British television, this espionage thriller is presented here in its entirety.